Abstract
At present, heavy metal elements in dust have great influence on air quality and human health,therefore, the content and influence of heavy metal elements on campus were studied. Firstly, PM10 and total dust in the autumn campus atmosphere were sampled for 10 consecutive days, and then digested by electric heating plate digestion method. Then, inductively coupled plasma emission spectrometer (ICP-OES) was used to detect and analyze the content and concentration ratio of seven heavy metal elements Cu, Pb, Cd, Zn, Cr, Hg and Ba in PM10 and total dust. Finally, through comparative analysis, it is concluded that heavy metal pollutants in the atmospheric environment are mainly Zn and Ba, and the concentrations of Cd, Zn and Ba are seriously exceeded, so the air quality in Xiqing District of Tianjin is poor, and the particle size distribution of Cd and Hg makes it easy to enter the human body, which is especially unfavorable to human health.
Highlights
Research backgroundHeavy metals in dust have gradually become the focus of research. Heavy metals in dust have a great impact on human health,the environmental quality standards for atmospheric dustfall have not yet been established in China, dust and heavy metals have been studied in depth, the research on heavy metals in dust is almost blank, and the relevant evaluation indexes for air conditions are various, and few heavy metals in dust are included in the evaluation indexes
1.1 Research backgroundIn recent years, heavy metals in dust have gradually become the focus of research
Heavy metals in dust have a great impact on human health,the environmental quality standards for atmospheric dustfall have not yet been established in China, dust and heavy metals have been studied in depth, the research on heavy metals in dust is almost blank, and the relevant evaluation indexes for air conditions are various, and few heavy metals in dust are included in the evaluation indexes
Summary
Heavy metals in dust have gradually become the focus of research. Heavy metals in dust have a great impact on human health,the environmental quality standards for atmospheric dustfall have not yet been established in China, dust and heavy metals have been studied in depth, the research on heavy metals in dust is almost blank, and the relevant evaluation indexes for air conditions are various, and few heavy metals in dust are included in the evaluation indexes. By comparison at home and abroad, it can be found that the average content of heavy metals in atmospheric deposition in China is generally higher than that in foreign countries. This may be related to China's current economic development level, industrial development structure and local value of heavy metals in soil. With the gradual improvement of economic level, society pays more attention to health,it can be predicted that heavy metals in dust will become a hot research target. The current research on heavy metals in dust has attracted wide attention from the society and academic circles, and the research results from various perspectives in academic circles are rich and colorful, but the research on heavy metals in campus areas is still blank,this paper compares the concentrations of heavy metals in inhalable particles (PM10) and total dust to explore their harm to human body
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